Abstract
Chromatographic performance of octadecyl‐bonded TiO2/SiO2 stationary phase was evaluated with Engelhardt and Tanaka test mixtures. In the two test protocol, some parameters influencing the retention, such as methylene selectivity (αCH2), steric selectivity (αO/T), hydrogen bonding capacity (αC/P), and ion exchange capacity (αB/P) were obtained. By separating several same compounds with different mobile phases, different results were obtained and they were compared with that in the reference, in which octadecyl‐bonded titania packing was prepared and a similar test was carried out. All of the results suggest that the octadecyl‐bonded TiO2/SiO2 stationary phase not only has good methylene selectivity and steric selectivity, but also shows a large potential in the separation of basic compounds.
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